Combining Texts

You have chosen 'Elucidation of some points in E.Schröder' by Gottlob Frege, 'Comments on a Certain Broadsheet' by René Descartes and 'First-order Logic, 2nd-order, Completeness' by Marcus Rossberg

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All the ideas for Modes of Existence, or select a subheading:
      A. Relations
      B. Properties
      C. Powers and Dispositions
      D. Universals
      E. Nominalism